EP2404560B1 - Patella resectioning guide - Google Patents

Patella resectioning guide Download PDF

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Publication number
EP2404560B1
EP2404560B1 EP11184387.6A EP11184387A EP2404560B1 EP 2404560 B1 EP2404560 B1 EP 2404560B1 EP 11184387 A EP11184387 A EP 11184387A EP 2404560 B1 EP2404560 B1 EP 2404560B1
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EP
European Patent Office
Prior art keywords
guide
patella
patient
resectioning
cutting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11184387.6A
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German (de)
English (en)
French (fr)
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EP2404560A1 (en
Inventor
Mark B Lester
James M Rhodes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DePuy Products Inc
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DePuy Products Inc
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Filing date
Publication date
Application filed by DePuy Products Inc filed Critical DePuy Products Inc
Priority to EP15150198.8A priority Critical patent/EP2862525B1/en
Publication of EP2404560A1 publication Critical patent/EP2404560A1/en
Application granted granted Critical
Publication of EP2404560B1 publication Critical patent/EP2404560B1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/14—Surgical saws
    • A61B17/15—Guides therefor
    • A61B17/154—Guides therefor for preparing bone for knee prosthesis
    • A61B17/158—Cutting patella
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/10—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis
    • A61B90/11—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges for stereotaxic surgery, e.g. frame-based stereotaxis with guides for needles or instruments, e.g. arcuate slides or ball joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A61B2034/108—Computer aided selection or customisation of medical implants or cutting guides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0018—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0019—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in hardness, e.g. Vickers, Shore, Brinell

Definitions

  • This invention relates to a patella resectioning guide.
  • Joint arthroplasty is a well-known surgical procedure by which a diseased and/or damaged natural joint is replaced by a prosthetic joint.
  • a typical knee prosthesis includes a tibial tray, a femoral component, and a polymer insert or bearing positioned between the tibial tray and the femoral component.
  • the knee prosthesis may also include a prosthetic patella component, which is secured to a posterior side of the patient's surgically-prepared patella. To do so, an orthopaedic surgeon may resect the posterior side of the patient's natural patella to secure the prosthetic component thereto.
  • the patella component articulates with the patient's natural or prosthetic femur during extension and flexion of the patient's knee.
  • orthopaedic surgeons use a variety of orthopaedic surgical instruments such as, for example, cutting blocks, drill guides, milling guides, and other surgical instruments.
  • orthopaedic surgical instruments are generic with respect to the patient such that the same orthopaedic surgical instrument may be used on a number of different patients during similar orthopaedic surgical procedures.
  • US-A-2005/234461 discloses a patella cutting block which has a mould in which a patella can be received.
  • the mould fits in a case which helps to locate the patella in the mould.
  • the case has a slot in its side wall which can guide a saw blade in a resection step.
  • the cutting block is used with a clamp which has a pair of ring shaped graspers. One of the grasper is fitted against the patella and the other fits around a protrusion on the face of the cutting block which faces away from the patella.
  • the invention provides a patella resectioning guide, as defined in claim 1.
  • the cutting guide may be formed from a material different from the material forming the body.
  • the cutting guide may be formed from a metallic material or a non-metallic material.
  • the body may be formed from a polymeric material.
  • the cutting guide may be over-moulded with the body. Additionally, in some embodiments, the body may have an outer surface opposite the bone-facing surface.
  • the resectioning guide may further include a medial side corresponding to the medial side of the patient's patella when patella is received in the negative contour of the body. Additionally, the resectioning guide may include a lateral side corresponding to the lateral side of the patient's patella when the patella is received in the negative contour of the body.
  • the cutting slot of the cutting guide may include a first opening on the medial side of the resectioning guide. The first opening may be sized to receive a cutting saw blade.
  • the cutting slot of the cutting guide may include a second opening on the lateral side of the resectioning guide. The second opening may also be sized to receive a cutting saw blade.
  • the resectioning guide may include an indentation formed on the medial side of the resectioning guide. The indentation may extend from the outer surface of the body to the cutting slot of the cutting guide.
  • the body of the resectioning guide may include a sidewall extending upwardly from the bone-facing surface and intersecting with the resectioning plane to prevent the cutting saw blade from extending beyond the body.
  • the sidewall may be positioned on the lateral side of the resectioning guide in some embodiments.
  • the cutting guide may be positioned on the medial side of the resectioning guide such that the negative contour of the body may be positioned between the cutting guide and the sidewall.
  • the resectioning guide may further include compressible foam material secured to the outer surface of the body.
  • the resectioning guide may further include an enclosed housing extending upwardly from the bone-facing surface of the body.
  • the enclosed housing may be spaced apart from the cutting guide.
  • the enclosed housing may have an aperture co-planar with the resectioning plane defined by the cutting slot.
  • the enclosed housing may be positioned on the medial side of the resectioning guide, and the cutting guide may be positioned on the lateral side of the resectioning guide such that the negative contour is formed between the cutting guide and the enclosed housing.
  • anatomical references such as anterior, posterior, medial, lateral, superior and inferior, are used in this document to refer to the orthopaedic implants and surgical instruments described herein as well as to refer to the patient's natural anatomy. Such terms have well-understood meanings in both the study of anatomy and the field of orthopaedics. Use of such anatomical reference terms in the document is intended to be consistent with their well-understood meanings unless noted otherwise.
  • FIG. 1 is a flow diagram with details of a method 10 which can be used to fabricate a customised patient-specific orthopaedic surgical instrument.
  • customised patient-specific orthopaedic surgical instrument is used in this document to refer to a surgical tool for use by a surgeon in performing an orthopaedic surgical procedure that is intended, and configured, for use on a particular patient.
  • a "customised patient-specific orthopaedic surgical instrument” is distinct from a standard, non-patient specific orthopaedic surgical instrument which is intended for use on a variety of different patients.
  • customised patient-specific orthopaedic surgical instrument is distinct from orthopaedic prostheses, whether patient-specific or generic, which are surgically implanted in the body of the patient. Rather, customised patient-specific orthopaedic surgical instruments are used by an orthopaedic surgeon to assist in the implantation of orthopaedic prostheses.
  • the customised patient-specific orthopaedic surgical instrument may be customised to the particular patient based on the location at which the instrument is to be coupled to one or more bones of the patient.
  • the customised patient-specific orthopaedic instrument may be a customised patient-specific patella resectioning guide including one or more bone-contacting or facing surfaces having a negative contour that matches the contour of a portion of the patient's patella, which is discussed in more detail below with reference to FIGS. 2 to 10.
  • the customised patient-specific patella resectioning guide is configured to be coupled to the patient's patella at a unique location and position with respect to the patient's bony anatomy.
  • the negative contours of the bone-contacting surfaces are configured to receive a matching contour surface of the portion of the patient's patella (and, in some cases, femur).
  • the orthopaedic surgeon's guesswork and/or intra-operative decision-making with respect to the placement of the patient-specific patella resectioning guide are reduced.
  • the orthopaedic surgeon may simply couple the customised patient-specific patella resectioning guide to the patient's patella. When so coupled, the customised patient-specific patella resectioning guide defines the thickness of bone the surgeon will resect from the posterior side of the patient's patella.
  • the method 10 includes process steps 12, 14 in which an orthopaedic surgeon performs pre-operative planning of the patella resectioning procedure to be performed on a patient.
  • the process steps 12, 14 may be performed in any order or contemporaneously with each other.
  • a number of medical images of the patient's patella and the surrounding bony anatomy are generated.
  • the orthopaedic surgeon or other healthcare provider may operate an imaging system to generate the medical images.
  • the medical images may be embodied as any number and type of medical images capable of being used to generate a three-dimensional rendered model of the patient's patella and surrounding bony anatomy.
  • the medical images may be embodied as any number of computed tomography (CT) images, magnetic resonance imaging (MRI) images, or other three-dimensional medical images.
  • CT computed tomography
  • MRI magnetic resonance imaging
  • the medical images maybe embodied as a number of X-ray images or other two-dimensional images from which a three-dimensional rendered model of the patient's patella and the surrounding bony anatomy may be generated.
  • the orthopaedic surgeon may determine any additional pre-operative constraint data.
  • the constraint data may be based on the orthopaedic surgeon's preferences, preferences of the patient, anatomical aspects of the patient, guidelines established by the healthcare facility, or the like.
  • the constraint data may include the orthopaedic surgeon's preference for a particular prosthesis type, the thickness of the bone to resect, the size range of the orthopaedic implant, and/or the like.
  • the orthopaedic surgeon's preferences are saved as a surgeon's profile, which may be used as a default constraint values for further surgical plans.
  • the medical images and the constraint data are transmitted or otherwise provided to an orthopaedic surgical instrument vendor or manufacturer.
  • the medical images and the constraint data may be transmitted to the vendor via electronic means such as a network or the like.
  • the vendor processes the images in step 18.
  • the orthopaedic surgical instrument vendor or manufacturer process the medical images to facilitate the determination of the proper positioning of the prosthetic component, implant sizing, and fabrication of the customised patient-specific patella resectioning guide as discussed in more detail below.
  • the vendor may convert or otherwise generate three-dimensional images from the medical images.
  • the vendor may use a suitable computer algorithm to generate one or more three-dimensional images from the number of two-dimensional images.
  • the medical images may be generated based on an established standard such as the Digital Imaging and Communications in Medicine (DICOM) standard.
  • DICOM Digital Imaging and Communications in Medicine
  • an edge-detection, thresholding, watershed, or shape-matching algorithm may be used to convert or reconstruct images to a format acceptable in a computer aided design application or other image processing application.
  • an algorithm may be used to account for tissue such as cartilage not discernable in the generated medical images.
  • any three-dimensional model of the patient-specific instrument may be modified according to such algorithm to increase the fit and function of the instrument.
  • the vendor may process the medical images, and/or the converted/reconstructed images from process step 20, to determine a number of aspects related to the bony anatomy of the patient such as the anatomical axis of the patient's bones, the mechanical axis of the patient's bone, other axes and various landmarks, and/or other aspects of the patient's bony anatomy.
  • the vendor may use any suitable algorithm to process the images.
  • the resectioning plane of the patient's patella is determined in process step 24.
  • the planned resectioning plane is determined based on the type, size, and position of the prosthetic patella component to be used during the orthopaedic procedure, on the process images such as specific landmarks identified in the images, and on the constraint data supplied by the orthopaedic surgeon in previous process steps 14, 16.
  • the type and/or size of the prosthetic patella component may be determined based on the patient's anatomy and the constraint data.
  • the constraint data may dictate the type, make, model, size, or other characteristic of the prosthetic patella component.
  • the selection of the prosthetic patella component may also be modified based on the medical images such that a prosthetic component usable with the bony anatomy of the patient and matching the constraint data or preferences of the orthopaedic surgeon is selected.
  • a digital template of the prosthetic patella component may be overlaid onto one or more of the processed medical images.
  • the vendor may use any suitable algorithm to determine a recommended location and orientation of the prosthetic patella component (i.e., the digital template) with respect to the patient's bone based on the processed medical images (e.g., landmarks of the patient's patella and/or femur defined in the images) and/or the constraint data. Additionally, any one or more other aspects of the patient's bony anatomy may be used to determine the proper positioning of the digital template.
  • the digital template along with surgical alignment parameters may be presented to the orthopaedic surgeon for approval.
  • the planned resectioning planes for the patient's patella may then be determined based on the determined size, location, and orientation of the prosthetic patella component.
  • other aspects of the patient's bony anatomy, as determined in process step 22 may be used to determine or adjust the planned resectioning planes.
  • the determined mechanical axis, landmarks, and/or other determined aspects of the femur and/or patella of the patient may be used to determine the planned resectioning planes.
  • a model of the customised patient-specific patella resectioning guide is generated.
  • the model is embodied as a three-dimensional rendering of the customised patient-specific patella resectioning guide.
  • the model may be embodied as a mock-up or fast prototype of the customised patient-specific patella resectioning guide.
  • the customised patient-specific patella resectioning guide to be modelled and fabricated may be determined based on the patella orthopaedic surgical procedure to be performed, the constraint data, and/or the type of prosthetic patella component to be implanted in the patient.
  • the particular shape of the customised patient-specific patella resectioning guide is determined based on the planned location of the patella resectioning guide relative to the patient's bony anatomy.
  • the location of the customised patient-specific patella resectioning guide with respect to the patient's bony anatomy is determined based on the type and determined location of the prosthetic patella component to be used during the orthopaedic surgical procedure. That is, the planned location of the customised patient-specific patella resectioning guide relative to the patient's bony anatomy may be selected based on, in part, the planned resectioning planes of the patient's bone(s) as determined in step 24.
  • the location of the patella resectioning guide is selected such that the cutting guide of the patella resectioning guide matches one or more of the planned resectioning planes determined in process step 24.
  • the planned location of the patella resectioning guide may be based on the identified landmarks of the patient's patella and femur identified in process step 22.
  • the particular shape or configuration of the customised patient-specific patella resectioning guide may be determined based on the planned location of the guide relative to the patient's bony anatomy. That is, the customised patient-specific patella resectioning guide may include a bone-contacting surface having a negative contour that matches a corresponding positive contour of a portion of the patella of the patient. The positive contour of the portion of the patella of the patient may be received in the negative contour of the patella resectioning guide such that the patella is placed in a unique location.
  • one or more guides (e.g., cutting guide) of the patella resectioning guide may be aligned to the one or more of the resectioning plane(s), as discussed above.
  • the model is validated in process step 28.
  • the model may be validated by, for example, analysing the rendered model while the three-dimensional model of the patient's patella is received in the resectioning guide model to verify the correlation of the cutting guide and the resectioning plane.
  • the model may be validated by transmitting or otherwise providing the model generated in step 26 to the orthopaedic surgeon for review.
  • the model is a three-dimensional rendered model
  • the model along with the three-dimensional images of the patient's relevant bone(s) may be transmitted to the surgeon for review.
  • the model may be shipped to the orthopaedic surgeon for validation.
  • the customised patient-specific patella resectioning guide is fabricated in process step 30.
  • the customised patient-specific patella resectioning guide may be fabricated using any suitable fabrication device and method. Additionally, the customised patient-specific patella resectioning guide may be formed from any suitable material such as a metallic material, a plastic material, or combination thereof depending on, as discussed in more detail below.
  • the fabricated customised patient-specific patella resectioning guide is subsequently shipped or otherwise provided to the orthopaedic surgeon. The surgeon performs the orthopaedic surgical procedure in process step 32 using the customised patient-specific patella resectioning guide.
  • the orthopaedic surgeon does not need to determine the proper location of the patella resectioning guide intra-operatively, which typically requires some amount of estimation on part of the surgeon, the guesswork and/or intra-operative decision-making on part of the orthopaedic surgeon is reduced.
  • variations in the bony anatomy of the patient may require more than one customised patient-specific patella resectioning guide to be fabricated according to the method described herein.
  • the patient may require the implantation of two prosthetic patella components to replace both natural knees.
  • the surgeon may follow the method 10 of FIG. 1 to fabricate a different customised patient-specific patella resectioning guide for use in replacing each natural knee.
  • Each customised patient-specific patella resectioning guide defines a particular resectioning plane relative to each particular patella that is different due to the variation in the bony anatomy of each knee joint.
  • FIGS. 2 to 4 show an embodiment of a customised patient-specific patella resectioning guide 40 which is configured to receive a portion of a posterior side 48 of a patient's patella 42 (see FIG. 4 ).
  • the resectioning guide 40 has a medial side 44 and a lateral side 46.
  • the medial side 44 corresponds to the medial side of the patient's patella 42 when the patella 42 is received in the resectioning guide 40.
  • the lateral side 46 corresponds to the lateral side of the patient's patella 42 when the patella 42 is received in the resectioning guide 40.
  • the orthopaedic surgeon may use the patella resectioning guide 40 to make a resectioning cut of the patient's patella 42.
  • a prosthetic patella component may be subsequently secured to the resected surface of the posterior side 48 of the patient's patella 42.
  • the patella resectioning guide 40 includes a body 50 and a captured cutting guide 52, which is secured to the body 50.
  • the body 50 is formed from a polymeric material such as polyethylene or ultra-high molecular weight polypropylene (UHMWPP), and the cutting guide 52 is formed from an implant grade metallic material such as steel, titanium, or cobalt chromium.
  • the cutting guide 52 may also be formed from a polymeric material. That is, the body 50 and the cutting guide 52 maybe formed from a single monolithic component. As such, the body 50 and the cutting guide 52 may be made of the same or different materials.
  • the body 50 includes a bone-facing surface 54 and an outer surface 58 opposite the bone-facing surface 54.
  • the bone-facing surface 54 extends from the medial side 44 of the resectioning guide 40 to the lateral side 46.
  • the bone-facing surface 54 includes a customised patient-specific negative contour 56 defined therein.
  • the negative contour 56 is configured to receive a corresponding positive contour 49 of the posterior side 48 of the patient's patella 42.
  • the negative contour 56 of the bone-facing surface 54 allows the surgeon to position the patient's patella 42 in the resectioning guide 40 in a unique, pre-determined location and orientation.
  • the outer surface 58 includes a recess 59 for use in holding the patient's patella in the resectioning guide 40.
  • the recess 59 has a round indentation 60 and a pair of slots 62 formed in the outer surface 58.
  • the recess 59 may include an indentation 60 formed as square, triangular, or any other form.
  • the recess 59 may include additional slots of differing sizes. The surgeon may secure the patella 42 to the body 50 by fixing the patella 42 and body 50 between two fingers. One of the fingers can be the surgeon's thumb.
  • the recess 59 is sized to receive one of the surgeon's fingers therein.
  • the recess 59 may not include the slots 62.
  • the cutting guide 52 includes a cutting slot 70 extending from the medial side 44 of the resectioning guide 40 to the lateral side 46 of the resectioning guide 40.
  • the cutting slot 70 defines a resectioning plane 72 that extends through the patient's patella 42 when the patella 42 is received in the customised patient-specific contour 56 of the body 50.
  • the cutting slot 70 extends from a medial opening 74 formed in the medial side 44 through an opening (not shown) into the negative contour 56 of the body 50.
  • the cutting slot 70 also extends from a lateral opening 76 formed in the lateral side 46 through an opening 82 into the negative contour 56 of the body 50.
  • the cutting slot 70 is sized to receive a cutting saw blade (not shown).
  • a viewing window 90 is formed on the medial side 44 of the resectioning guide 40.
  • the viewing window 90 is formed as an indentation 92 extending from the outer surface 58 of the body 50 to the interior of the cutting slot 70 of the cutting guide 52.
  • the viewing window 90 is positioned to allow the surgeon to view the cutting saw blade within the cutting slot 70.
  • the body 50 and cutting guide 52 may include additional viewing windows of different sizes and shapes to facilitate the surgeon's view of the cutting saw blade.
  • the resectioning guide 40 may include a viewing window on each of the medial and lateral sides 44, 46.
  • the patella 42 remains secured to the tendons 100 of the patient during the resectioning procedure.
  • the tendons 100 may contact the bone-facing surface 54 of the body 50 when the positive contour 49 of the posterior side 48 of the patient's patella 42 is received in the negative contour 56.
  • the body 50 may include indentations in the bone facing surface 54 to provide space to receive a portion of the tendons 100.
  • an orthopaedic surgeon may secure the patella 42 to the body 50, and may then insert the cutting saw blade into the opening 76.
  • the blade passes through the cutting slot 70 and contacts the medial side of the portion of the patella 42 received in the negative contour 56.
  • the surgeon may perform the resectioning cut on the patient's patella 42 by moving the saw blade back and forth within cutting slot 70.
  • the blade is received in the opening 82 of the cutting slot 70. In this way, the blade is captured on both the medial side and the lateral side of the patient's patella 42.

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  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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  • Orthopedic Medicine & Surgery (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Transplantation (AREA)
  • Pathology (AREA)
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  • Prostheses (AREA)
  • Medicines Containing Plant Substances (AREA)
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EP11184387.6A 2009-01-16 2010-01-12 Patella resectioning guide Active EP2404560B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15150198.8A EP2862525B1 (en) 2009-01-16 2010-01-12 Patella resectioning guide

Applications Claiming Priority (2)

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US12/355,235 US20100185202A1 (en) 2009-01-16 2009-01-16 Customized patient-specific patella resectioning guide
EP10150487A EP2208470B1 (en) 2009-01-16 2010-01-12 Patella resectioning guide

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EP10150487A Division EP2208470B1 (en) 2009-01-16 2010-01-12 Patella resectioning guide
EP10150487.6 Division 2010-01-12

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EP15150198.8A Division-Into EP2862525B1 (en) 2009-01-16 2010-01-12 Patella resectioning guide
EP15150198.8A Division EP2862525B1 (en) 2009-01-16 2010-01-12 Patella resectioning guide

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EP2404560A1 EP2404560A1 (en) 2012-01-11
EP2404560B1 true EP2404560B1 (en) 2015-06-03

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EP11184387.6A Active EP2404560B1 (en) 2009-01-16 2010-01-12 Patella resectioning guide
EP10150487A Active EP2208470B1 (en) 2009-01-16 2010-01-12 Patella resectioning guide
EP15150198.8A Active EP2862525B1 (en) 2009-01-16 2010-01-12 Patella resectioning guide

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US (1) US20100185202A1 (enExample)
EP (3) EP2404560B1 (enExample)
JP (1) JP5570826B2 (enExample)
CN (1) CN101797175B (enExample)
AT (1) ATE547054T1 (enExample)
AU (1) AU2010200130B2 (enExample)
DK (1) DK2208470T3 (enExample)
ES (1) ES2379592T3 (enExample)
ZA (1) ZA201000324B (enExample)

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JP2010162353A (ja) 2010-07-29
EP2208470B1 (en) 2012-02-29
CN101797175A (zh) 2010-08-11
DK2208470T3 (da) 2012-05-29
ATE547054T1 (de) 2012-03-15
AU2010200130A1 (en) 2010-08-05
US20100185202A1 (en) 2010-07-22
ES2379592T3 (es) 2012-04-27
EP2862525B1 (en) 2016-10-26
EP2862525A1 (en) 2015-04-22
JP5570826B2 (ja) 2014-08-13
EP2404560A1 (en) 2012-01-11
EP2208470A1 (en) 2010-07-21
AU2010200130B2 (en) 2014-06-05
CN101797175B (zh) 2014-05-14
ZA201000324B (en) 2011-10-26

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